1. Dept. of Energy and Environment, Faculty of Engineering Technology; Universiti Malaysia Pahang; Gambang 26300 Malaysia
2. Dept. of Bioprocess Engineering, Faculty of Chemical and Natural Resources Engineering; Universiti Malaysia Pahang; Gambang 26300 Malaysia
3. Dept. of Electrical Engineering, Faculty of Engineering Technology; Universiti Malaysia Pahang; Gambang 26300 Malaysia
4. Dept. of Biotechnology Engineering, Faculty of Engineering; International Islamic University Malaysia; Gombak Kuala Lumpur 50728 Malaysia
5. Dept. of Chemical Engineering, Materials and Industrial Production; University Naples Federico II; Naples Italy